HOTWORX - Doylestown, PA - Mercer Square is a 24-hour infrared fitness studio and gym in Doylestown offering virtually instructed workouts in patented infrared saunas. The studio features hot yoga, Pilates, barre, cycling, HIIT, and other sessions, with unlimited 24-hour member access. Veteran-owned and community-focused, it serves Doylestown, New Britain, and Warrington with a fitness experience designed for a range of ages and skill levels.